Question

1.
Two balls are drawn from a bag containing 5 white and 7 black balls. Find the probability of
selecting 2 white balls if
(1) the first ball is replaced before drawing the second.
(ü) the first ball is not replaced before drawing the second.
hinho​

Answer 1

Answer:

Two balls are drawn from a bag containing 5 white and 7 ... However, if the first ball is not replaced, the probability ... These are fever of one colour and one ball loss

Step-by-step explanation:

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Answer 2

Answer:

given :

a bag contain 5 white and 7 black balls where 2 are select

find :

probablity of 2 white ball selecting with replacement and without replacement

answer :

1st with replacement

first draw and get white ball probability = 5/12

( replace mean it put into bag before second draw so second draw also have total 12 balls )

second draw and get white ball = 5/12

ans of probability = 5×5/12×12 = 25/144

2nd without replacement

first draw and get white ball = 5/12

( notice there is no replacement so in second draw one ball less which we select 1 out of 5 white balls )

( so for second draw we have 4 white ball and total 11 balls )

second draw select have also white ball= 4/11

ans of probability = 5×4/12×11 = 20/132

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